Jayhawk Athletic Performance Laboratory-Wu Tsai Human Performance Alliance, Department of Health, Sport and Exercise Sciences, University of Kansas, Lawrence, Kansas; and.
The Research Center, Faculty of Sport and Physical Education, University of Belgrade, Belgrade, Serbia.
J Strength Cond Res. 2023 Nov 1;37(11):e609-e612. doi: 10.1519/JSC.0000000000004608.
Cabarkapa, D, Cabarkapa, DV, Philipp, NM, Knezevic, OM, Mirkov, DM, and Fry, AC. Pre-post practice changes in countermovement vertical jump force-time metrics in professional male basketball players. J Strength Cond Res 37(11): e609-e612, 2023-Despite the countermovement vertical jump (CVJ) being one of the most popular noninvasive and time-efficient methods for monitoring neuromuscular status, there is a lack of scientific literature focused on examining fatigue-induced alterations in performance in elite athletes. Thus, the purpose of this study was to examine changes in force-time metrics pre-post practice in professional male basketball players. Seventeen athletes competing in first-tier and second-tier national basketball leagues in Europe participated in this study. While standing on a uniaxial force plate sampling at 1,000 Hz, each athlete completed 3 CVJs pre-practice and post-practice. The practice consisted of individual and team shooting drills, position-specific player development drills, 5-on-0 offensive actions, and 5-on-5 play, including full-court transition (∼2 hours). The findings reveal that pre-post practice changes in force-time metrics seem to be phase specific. Despite a trivial increase in eccentric mean force (920.4 ± 100.2, 929.4 ± 100.0 N), most changes were observed within the concentric phase of the CVJ. The concentric phase duration increased pre-post practice (0.233 ± 0.027, 0.242 ± 0.033 seconds), whereas concentric impulse (262.9 ± 18.8, 258.6 ± 21.6 N·s), peak velocity (2.93 ± 0.22, 2.86 ± 0.22 m·s-1), mean force (2052.4 ± 179.2, 2002.7 ± 188.2 N), mean power (3,165.5 ± 269.5, 3,030.9 ± 326.8 W), and peak power (5,523.4 ± 607.3, 5,246.6 ± 663.7 W) experienced a significant decrease. Moreover, alongside longer contraction time (0.663 ± 0.065, 0.686 ± 0.074 seconds), lower vertical jump height (41.0 ± 6.8, 38.9 ± 6.6 cm) and reactive strength index-modified (0.634 ± 0.113, 0.579 ± 0.111 m·s-1) values were observed post-practice. Overall, these findings may allow practitioners to detect fatigue-induced changes in CVJ force-time metrics in professional male basketball players that can ultimately improve the acute and longitudinal training-adaptation monitoring process.
卡巴卡帕、D、卡巴卡帕、DV、菲利普、NM、克涅泽维奇、OM、米尔科夫、DM 和弗莱、AC。职业男性篮球运动员进行反跳垂直跳跃力量时间指标的练习前后变化。J 力量与条件研究 37（11）：e609-e612，2023 年-尽管反跳垂直跳跃（CVJ）是监测神经肌肉状态最流行的非侵入性和高效的方法之一，但缺乏针对精英运动员疲劳引起的性能变化的科学文献。因此，本研究的目的是检查职业男性篮球运动员练习前后力量时间指标的变化。来自欧洲第一和第二梯队国家篮球联赛的 17 名运动员参加了这项研究。当运动员站在单轴力量板上以 1000 Hz 的速度采样时，每个运动员在练习前和练习后完成 3 次 CVJ。练习包括个人和团队投篮练习、特定位置的球员发展练习、5 对 0 进攻动作和 5 对 5 比赛，包括全场过渡（约 2 小时）。研究结果表明，练习前后力量时间指标的变化似乎是特定阶段的。尽管离心平均力（920.4±100.2、929.4±100.0 N）略有增加，但大多数变化发生在 CVJ 的向心阶段。CVJ 的向心阶段持续时间在练习前后增加（0.233±0.027、0.242±0.033 秒），而向心冲量（262.9±18.8、258.6±21.6 N·s）、峰值速度（2.93±0.22、2.86±0.22 m·s-1）、平均力量（2052.4±179.2、2002.7±188.2 N）、平均功率（3165.5±269.5、3030.9±326.8 W）和峰值功率（5523.4±607.3、5246.6±663.7 W）均显著下降。此外，与收缩时间延长（0.663±0.065、0.686±0.074 秒）、垂直跳跃高度降低（41.0±6.8、38.9±6.6 cm）和反应强度指数修改（0.634±0.113、0.579±0.111 m·s-1）相关的较低值同时也出现在练习后。总体而言，这些发现可以帮助从业者检测职业男性篮球运动员 CVJ 力量时间指标的疲劳诱导变化，这最终可以提高急性和纵向训练适应监测过程。
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